The Sosva (Russian: Сосьва) is a river in Sverdlovsk Oblast, Russia, a right tributary of the Tavda River. The length of the river is 635 kilometres (395 mi). The area of its drainage basin is 24,700 square kilometres (9,500 sq mi). The Sosva freezes up in early November and breaks up in April. It is navigable within 333 kilometres (207 mi) of its estuary.